85 lines
3.4 KiB
Java
85 lines
3.4 KiB
Java
package app.fedilab.nitterizeme;
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/* Copyright 2020 Thomas Schneider
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*
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* This file is a part of NitterizeMe
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* NitterizeMe is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with NitterizeMe; if not,
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* see <http://www.gnu.org/licenses>. */
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import java.io.IOException;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Map;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.net.ssl.HttpsURLConnection;
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import static app.fedilab.nitterizeme.MainActivity.shortener_domains;
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class Utils {
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static final Pattern urlPattern = Pattern.compile(
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"(?i)\\b((?:[a-z][\\w-]+:(?:/{1,3}|[a-z0-9%])|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,10}/)(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{};:'\".,<>?«»“”‘’]))",
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Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
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/**
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* Returns the unshortened URL
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*
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* @param urls ArrayList<String> URL to check
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*/
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static void checkUrl(ArrayList<String> urls) {
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URL url;
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String newURL = null;
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String comingURl;
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try {
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comingURl = urls.get(urls.size() - 1);
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if (comingURl.startsWith("http://")) {
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comingURl = comingURl.replace("http://", "https://");
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}
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url = new URL(comingURl);
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HttpsURLConnection httpsURLConnection = (HttpsURLConnection) url.openConnection();
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httpsURLConnection.setRequestProperty("http.keepAlive", "false");
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httpsURLConnection.setInstanceFollowRedirects(false);
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httpsURLConnection.setRequestMethod("HEAD");
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if (httpsURLConnection.getResponseCode() == 301) {
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Map<String, List<String>> map = httpsURLConnection.getHeaderFields();
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for (Map.Entry<String, List<String>> entry : map.entrySet()) {
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if (entry.toString().toLowerCase().startsWith("location")) {
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Matcher matcher = urlPattern.matcher(entry.toString());
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if (matcher.find()) {
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urls.add(matcher.group(1));
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newURL = matcher.group(1);
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}
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}
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}
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}
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httpsURLConnection.getInputStream().close();
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if (newURL != null && newURL.compareTo(comingURl) != 0) {
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URL redirectURL = new URL(newURL);
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String host = redirectURL.getHost();
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String protocol = redirectURL.getProtocol();
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if (protocol != null && host != null) {
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if (Arrays.asList(shortener_domains).contains(host)) {
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checkUrl(urls);
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}
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}
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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